We will extend our investigation of the magnetic microstructure of two-phase hard-soft nanocomposites – using the combination of small-angle neutron scattering (SANS) and full-scale micromagnetic simulations – to other classes of ferromagnets with a complicated internal structure. Our studies will employ both our numerical methodology developed during the preceding DFG project (“SANS-MicMag” or BE 2464/10-1 – MI 738/6-1) and advanced experimental SANS techniques such as the longitudinal neutron-polarization analysis (POLARIS), which has become available on SANS instruments during the last years. Motivated by the successful explanation of the recently observed so-called “clover-leaf” angular anisotropy in the magnetic SANS cross-section of the Fe-based alloy Nanoperm, we intend to continue our software development to enable the calculation of magnetization distributions and corresponding magnetic SANS cross-sections for most practically relevant nanocrystalline systems (elementary nanocrystalline magnets like Co, Ni, Tb and Gd, porous magnetic materials, “soft” bi-component composites, etc.). From an experimental point of view, the SANS experiments should allow us to probe the spin microstructure of these systems in the bulk of our samples and on the length scale from a few up to a few hundreds of nanometers. Hence, the prolongation of the currently running DFG project “SANSMicMag” will provide further deep insights into the process of magnetic neutron scattering from nanomagnets for a much broader class of nanocrystalline magnetic materials than available previously.